Blank-trimming machine.



A. W. AINSWORTH, S. J. PUTNAM & K. A. BDSTROM.

BLANK TRIMMING MACHINE.

MPLIGATION FILED FEB. 26, 1908.

956,871 Patented May 3, 1910.

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I WITNESSES lNVEgTOR-S M M Attorney A. W. AINSWORTH, S. J. PUTNAM & K.A. BDSTROM. BLANK TRIMMING MACHINE.

APPLICATION FILED T11R25, 190a. Patented M313, 1910.

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ALFRED W. AINSWORTH, SAMUEL J. PUTNAM, AND KARL A. EDSTROM, 0F DENVER,COLORADO.

BLANK-TRIMMING MACHINE.

To all whom it may concern:

Be it known that we, ALFRED \V. AinswoR'rH, SAMUEL J. PUTNAM, and KaneA.

age of money, may be reduced in weight when above the standard, and isespecially applicable to milling machines used to roll the milled edgeson coin.

In ourinvention in coining over-weight blanks, the milling machine is soadjusted as not only to mill the edge of the coin but to create a bur orup set around such edge, which bur or up set is removed by suitablecutters, thereby reducing the weight of the blank to the proper amount,the cutters being adjustable for this purpose.

WVith the above object in view, the invention may be said to consist inthe combination with the grooved shoe and grooved disk of a millingmachine, of a pair of cutters located between the disk and the shoe andone on each side of the plane of travel of the blank passingtherebetween, with if nccessary, proper means, for adjusting theposition of the knives in respect to each other, and in respect to theplane of travel of the blank and for guiding the cutters and centeringthem in respect to the blanks.

It further consists in the construction, arrangement and combination ofthe several parts of which it is composed as will be hereinafter morefully described and claimed.

Referring to the accompanying drawings in which corresponding parts aredesignated by corresponding marks of reference: Figure 1 is a plan viewof a device constructed according to this invention. Fig. 2 is a centralvertical section on lines22 thereof. Fig. 3 is an inside elevation ofthe shoe and cutters. Fig. 4 is a detail view of the cutter carryingmechanism.

A suitable support or table 1 carries a vertical shaft 2, driven byappropriate mechanism 3 and having on its upper end, the disk 4 providedwith a peripheral groove 5. The table also carries by brackets 6 a shoe6, having a curved inner face grooved at 7 in the same plane as thegroove 5 in Specification of Letters Patent.

Application filed February 25, 1908.

Patented May 3, 1910.

Serial No. 417,744.

the disk, the shoe being so disposed relatively to the disk that thespace between the bottom of the grooves 5 and 7, at that end of theshoe, into which the unmilled blank is fed, is greater than thecorresponding space, at the opposite end of the shoe, which is the endfor the exit of the blank. One or both of the grooves 5 and 7 have theirbottoms provided with fine indentations or teeth, indicated in F jig. 3,whereby the blank passing through the run way formed by the two grooves,will have its edges milled, and at the same time will beslightly set upat its edges. A machine as thus constructed is capable of properlymilling a blank of the exact weight, but for the purpose of trimming orreducing the weight of an overweight blank, we provide trimmingmechanism carried by the shoe. In the embodiment shown such mechanismtakes the form of cutters 9 located above and below the runway, that isbetween the disk and shoe, and above and below the plane in which thegrooves therein are located. Each of these cutters are straight and of alength several times as great as the diameter of the blanks.

The blanks in their travel along the run-- way are rotated by thedriving action of the disk and are fed thereby so that they pass betweenthe cutters while rotating. Thus the up-set edge at the end of onediameter of a disk is fed toward the outer faces of the cutters whilethe Lip-set edge at the opposite end of the same diameter is fed towardthe inner faces of the cutters, and as the disk is fed during suchrotation, each portion of each face of each of the knives will thus atone period or the other of the rotation of the blank be called into playin removing the up-set edge. For this reason the cutters have cuttingedges 10 on both their inner and outer faces. They are carried in aU-shaped frame 11 encircling the shoe and held against lateraldisplacement thereon by means of bolts 12. The frame 11 is by preferencemade in two pieces 11 and 11 slidably connected by means of ways 13located in the connecting member of the frame, the bolts 19. passthrough the two arms of the frame, engaging them with oppositelydisposed threads, and are geared together as at 14. One of the bolts isprovided with a handle 15 by which it and the gear 14. may be rotated inunison, whereby the two arms of the frame may be caused to approach andrecede from each other and thus to vary the distance between the cuttingedges of the cutters, while at the same time, the frame as a whole andthe cutters carried thereon, are free to move transversely in respect tothe shoe. Adjusting screws '16 are provided in'the upper part 11 of thecutter frame limiting its downward motion in respect to the shoe, andthe frame also carries an adjustable guide 17 provided with a flaredmouth located toward the entering end of the run-way and straddling thesame. When the machine is in operation the blanks arefed to the run-wayat the entering end thereof, and each one in its movement toward thecutters enters the flared mouth of the guide and thus shifts the cutterframe to such extent as may be necessary to center it in respect to suchblank and to permit the blank to enter centrally between the knives,which may be adjustably carried in the knife frame to adjust for wear.

With the mechanism above described it will be seen that the amount ofmetal removed from the blank is determined by the adjustment of cuttersto or from each other and that as such cutters with the frame in' whichthey are carried is movable as a whole across the plane by the blankbeing trimmed, the work of the two cutters is equalized.

Having thus described our invention, what we claim and desire to secureby Letters Patent is:

1. The combination with a milling former and its shoe, forming a run-wayfor a blank, of cutters located on each side of the runway and adaptedto remove metal upset by the former and shoe.

2. The combination with a milling former and its shoe, forming a run-wayfor a blank, of cutters located on each side of the runway and rigidlyconnected together and free to move together transversely to the runway,for removing metal upset by the former and shoe.

3. The combination with a milling former and its shoe, forming a run-wayfor a blank, of elongated double edge cutters located on each side ofthe run-way, and adapted to remove metal up-set by the former and shoe.

4.. The combination with a milling former and its shoe, forming arun-Way for a blank, of elongated double edged cutters located on eachside of the run-way, and rigidly conthe run-way in umson.

6. In combination with a milling disk and its fixed shoe, forming arun-way for a blank, of a frame consisting of two parts, and free tomove transversely thereto, a cutter carried on each part of the frame onopposite sides of the run-way and means for causing the two parts of theframe to approach and recede from the plane of the run-way in unison.

7 In combination with a milling disk and its fiked shoe, forming arun-way for a blank, of a frame consisting of two parts, and free tomove transversely thereto, a flared guide carried by the frame,projecting on each side of the run-way, and a cutter carried on eachpart of the frame and on opposite sides of the run-way to receive theblank from the guides and means for causing the two parts of the frameto approach and recede from the plane of the run-way in unison.

8. The combination in a blank reducing machine, of a rotating grooveddisk, a grooved shoe located adjacent thereto and forming between it andthe disk a run-Way for the blank, a two part cutter frame freely movableas a whole transversely in respect thereto, means for causing the twoparts of the frame to approach and recede in unison from the plane ofthe run-way, an elongated double edged cutter carried by each part ofthe frame projecting in the proximity to the run-way on each sidethereof, and a flared guide carried by the frame in proximity to therun-way and on that side of the cutters to which the blanks feed fordelivering the blanks to the cutters.

ALFRED WV. AINSWORTH. SAMUEL J. PUTNAM. KARL A. EDSTROM.

Witnesses R. H. SHINKLE, W. WV. LAWS.

